What a very big and pretty Hoya Jonna!
And just about to bloom too!
The speckled leaves on your Hoya reminds me of my Hoya pubicalyx 'Silver Pink' ..sorry no photo of its blooms..just the leaves..and I have killed mine when I left it outdoors last winter.
Hope you find the actual name of your plant..at least it is about to bloom, so a more definite ID can be made